This happened in 1.5 Beta as well but I didn't report it then as I wasn't sure if I'd remembered to save after setting the config, however this time I've explictly saved and rebooted and it does indeed disappearThe route map and it's rules remain but the Rip config itself seems to vanish.

I guess it's probably something silly like the pptp interface isn't yet created at the time the config tries to apply.

The reason I'm running RIP over PPTP is so I can route multiple subnets over an IPSEC connection as the other Peer has a license restriction on the number of IPSEC tunnels it will support and they count each IP pair as a different tunnel